INSTALLATION INSTRUCTIONS - Lennox

Troubleshooting: Burner starts, but no flame is established.
Source Procedure Causes Correction
Oil Supply
Oil Filters & Oil Line
Oil Pump
Nozzle
Ignition Electrodes
Ignition
Transformer
Burner Motor
Check tank gauge or use dip
stick.
Coat dip stick with litmus paste
and insert into bottom of tank.
No oil in tank
Water in oil tank
Fill tank.
Listen for pump whine. Tank shut−off valve closed Open valve.
Listen for pump whine.
Open bleed valve or gauge port.
Start the burner. No oil or milky
oil indicates loss or prime.
Install pressure gauge on pump
and read pressure. Should not
be less than 140 psi.
Disconnect ignition leads. Observe
the oil spray (gun assembly
must be removed from unit).
Inspect the nozzle for plugged
orifice or carbon build−up around
orifice.
Remove gun assembly and inspect
electrodes and leads.
Connect ignition leads to the
transformer. Start burner and
observe spark. Check line voltage
to transformer primary.
Motor does not come up to
speed and trips out on overload.
Turn off power and rotate blower
wheel by hand to check for binding
or excessive drag.
Oil line filter is plugged
Kinks or restriction in oil line
Plugged fuel pump strainer
Air leak in oil supply line
Pump is partially or completely
frozen. No pressure and the
motor locks out on overload.
Coupling disengaged or broken
− no pressure
Fuel pressure too low
Nozzle orifice plugged
Nozzle strainer plugged
Poor or off center spray
Fouled or shorted electrodes
Dirty electrodes and leads
Eroded electrode tips
Improper electrode gap spacing
Improper position of electrode
tips
Bad buss bar connection
Cracked or chipped insulators
Cracked or burned lead insulators
Low line voltage
Burned out transformer windings.
No spark or weak spark
Low line voltage
Pump or blower overloading
motor
Faulty motor
If water depth exceeds 1 inch,
pump or drain water.
Replace filter cartridges.
Repair or replace oil line.
Clean strainer or replace pump.
Locate and correct leak.
Tighten all connections.
Replace pump.
Re−engage or replace coupling.
Adjust to 100 psi.
Replace nozzle with the same
size, spray angle, and spray
type.
Clean electrode leads.
Clean electrode tips and reset
the gap to 5/32 inches and correctly
position tips.
Retension and realign.
Replace electrode.
Replace electrode leads.
Check voltage at power source.
Correct cause of voltage drop
or call the power company.
Replace the transformer.
Properly ground the transformer
case.
Check voltage at power source.
Correct cause of voltage drop
or the call power company.
Correct cause of overloading.
Replace motor.
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